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"Ghosts are just boneless people"
(dubvee.org)
A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. The best ones are thoughts that many people can relate to and they find something funny or interesting in regular stuff.
This implies that the bones are elsewhere, forming a gang of spooky scary skeletons.
Which begs the wake and bake question: Do they become separate entities? Like, do the spooky scary skeleton and the ghost of the person it came from haunt people separately?
Ghosts hold grudges while skeletons just wanted to focus on spooky business